Bolt 'sad' doping talk dominating Beijing worlds

Jamaican sprint star Usain Bolt expressed his sadness Thursday that doping issues rather than track talk were dominating the build-up to the world championships that start in Beijing on Saturday. Athletics' world governing body IAAF has recently been mired with allegations over doping, while Bolt's main sprint rival is Justin Gatlin, the controversial American who has served two doping bans, the latter for four years after testing positive for testosterone.